Upsetting tool



H. G. CARLSON,

UPSETTING TOO-L.

APPLICATlON FILED SEPT-21'119l8.

. 402 9 9 Patented Jan. 10, 1922.

2 SHEETSSHEET l- I-IJALMAR CARLSON, F WORCESTER, MASSACHUSETTS,ASSIGNOR, BY MESNE ASSIGNMENTS, TO ROCKWOOD SPRINKLER COMPANY OFMASSACHUSETTS, OF WOBCESTER, MASSACHUSETTS, A CORPORATION OFMA$SACHUSETTS.

UPSETTING moor.

Specification of Letters Patent.

Patented J an. id, 1922.

Application filed September-21,1918. Serial no. 255,174.

T 0 all whom it may concern:

Be it known that I, HJALMAR G. CAnLsoN, a citizen of the United States,residingat Worcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Upsetting Tool, of whichthe following is a specification.

This invention relates to a set of dies for upsetting purposes.

The principal object of the invention is to provide. a construction ofdie which will permit of the upsetting of a blank or unfinished articlein such a way as to form a square shoulder, and also in the preferredform of the invention to produce a thick transverse wall or diaphragmterminating in said shoulder. Another object is to produce these resultsby operations that involve no waste of metal because none of it has tobe removed from the article. Further objects and advantages of theinvention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which- F 1 is acentral sectional view of material portions of a die press showing apreferred embodiment of this invention applied thereto;

2 is a similar view on enlarged scale showing merely the die cavity andassociatel parts, and

Fig. 8 is a similar view showing the parts in the position they assumewhen the upsetting operation is completed.

The invention is illustrated herein as used for the purpose ofperforming one operation in the manufacture of a combined adapter andbooster casing A. This is received in the machine in the form shown inFigs. 1 and 2 in which it has a small cylindrical closed end, a largecylindrical open end a and a flat flange. The operation of the machinereshapes and shortens its large end to the form shown in 3 in which thesloping shoulder is squared up and a thick dia phragm or transverse walla is formed. It is to '7 be understood, however, that the inventioncapable of use in connection with the manufacture of other articles of asimilar shape. and in fact of various other shapes. \Vhile this is anupsetting operation it is performed by means of a die and punch soarranged that when the punch comes to its seat against the metal in thedie, it will force the metal out into the form of a sharp shoulder andat the same time thicken the metal transversely so as to make a thicktransverse wall or diaphragm.

Enough of the press is: shown to illustrate the metal working operation,which is the subject of this invention. For that purpose I have shownthe press bolster plate 10 supporting the usual die bed 11. This die bedsupports a female die shown as consisting of a plurality of members. Formechanical reasons I prefer to make it in several pieces. There is acentral member 12 for receiving the blank A and the headed ejector 18 atthe bottom. It supports a second member 14 which is hollowed out at thecenter to receive central die member 15. (in this die member 15 issupported a shoulder-forming die member 16 in the form of a ring havinga flange at the bottom resting on the member 15. This member 16 isheldfirmly in position against the member 15 by a plate 17 held down byscrews 18 entering the die bed. The member 1 1 is provided with socketswhich support springs 20 which in turn support a movable die plate 21adapted to move back and forth between the inner surface of the recessin the member 17 in which it is located and a stop plate 22 in the formof a ring. This is held down by the screws 18 and it projects over theedge of the plate '21. The springs 20 normally hold this plate 21 upagainst the plate 22.

Also supported by the bolster plate are a pair ofbolts 25 provided withsprings 26, which springs hold up a stripper or pressure plate 27 whichis movable up and down guided by the bolts 25. This plate is providedwith a central platen 28 which, as will be seen, forms a part of theshaping mechanism. The parts 27 and 28 are positively and firmly forceddown by the bottom of the press slide 29 by well-known means asindicated. These parts 27 and 28 therefore, reciprocate with the pressslide 29 positively.

Inthe press slide 29 is a recess at 30 having a strong spring 31 thereinpressing on a movable member 32 which supports ablock I art. Above themember 32 is a block 35 which rests loosely thereon and is spacedslightly from the top of the recess 30. In the operation of the plunger34:, due to the reciprocation of the slide 29, the plunger is normallyunder the pressure of the heavy spring 31 at all times. If, however, anyobstacle is met that increases the difficulty of forcing the plungerinto the dies or article below, the amount that it can yield is limitedby the length of the space between the top of the'block 35 and the topof the recess 30. The plunger is shown as longitudinally perforated tolet the air out of the blank A when it descends.

The operation of the device is as follows: The partly finished articleor blank A of cold drawn sheet metal is put into the central recess orcavity in the die plate 21 by hand. It will normally slide down eitherinto the position shown in, Figs. 1 and 2 or nearly to that position.The press is then operated to bring the plunger down under the pressureof the spring 31 and the platen 28 downpositively. Before the plungerencounters any great resistance the platen 28 encounters and pressesdown upon the flat flange of the ar ticle A, which rests on the top ofthe die plate 21. As this platen 28 continues to descend under theinfluence of the positive pressure of the slide, it lowers the plate 21against the resistance of the springs 20, and during that period theplunger continues to descend until it reaches the bottom of the article.The plunger is provided with a shoulderat 36 which comes finally intothe position shown in Fig. 3; It will be noted that the ring 16 isstationary and cannot descend with the plate 21, but the open end of thearticle A with its flat flange does descend under the positivepressure'ofthe platen '28. Therefore the metal in the portion a of theblank is upset and forced out into the shoulder formed between theouter'edge of the ring 16 and the central passage through the die plate21, as well as into the upper shoulder on'the inside edge of the flangeand against the shoulder 36 on the plunger. These parts are soproportioned and arranged that the diaphragm or transverse wall a of thearticle being operated upon is materially thickened because it receivessome of the surplus metal from the portion a.

When the plunger 34: and platen 28 are withdrawn the springs 20 tend toforce the die plate 21 up to the original position and thus loosen thearticle from the dies below, and then the ejector 13 is operated in theusual way to force it out. It is to be observed that the plunger 34:both in its small and large sections is made to fit exactly in the blankas it is originally put into the press. Except for the shoulder 36, itis just like the plunger previously used to bring the blank up to thatshape. So its only effect is to hold the metal and prevent its beingsqueezed inwardly in any direction except to fill out the shoulders asabove mentioned. The positive compression due to the lowering of theplaten 28 on the external flange of the article is also essential forthe same purpose. This has to press down firmly on the article in orderto avoid any danger of the flange itself receiving any of the sur- 7plus metal from the section a.

It will be understood, of course, that while I havedescribed theinvention as employed in the production of a particular article and theformation of a shoulder and thickened wall at a certain point therein,the invention is not limited to the production of an article of thatshape or even to articles of similar shapes, but is of a generalcharacter as represented in the claims.

Therefore I do not wish to be limited to all the details of constructionherein shown and described, but what I do claim is 1. The combination ofa diecomprising a part for receiving and holding thearticle or blank tobe operated upon and a relatively movable plate beyond the first namedpart and normally spaced from it but having only a limited range ofmotion relative thereto, and a second die member relatively movable toengage the article in the first die and provided with means associatedwith it for engaging said relatively movable plate so as to hold anypart of the article extending between them, and then by their relativemo 100 tion upset the metal.

2. In a machine for upsetting'a blank having a tubular part providedwith a larger diameter at one place than at another and a shoulder atthe end of the larger part, the 05 combination of a die for supportingsaid blank provided with a member surrounding the blank and adapted toabut against the shoulder I thereof, a yieldingly mounted plate having apassage therethrough for the 0 surrounding member and for receiving thelarge tubular portion of the blank, and means whereby pressure can beexerted against said movable plate and at the same time hold the edge ofthe blank and force its 115 larger part longitudinally to upset themetal against the edge of said surrounding memher and shape theshoulder.

3. In a device of the character described, the combination of a pair ofdies, one die having a cavity for receiving a substantially tubulararticle to be shaped therein and having a stationary part fitting thearticle and also a relatively movable yielding plate having a passagethrough the center thereof for said stationary part, whereby when movedlongitudinally toward the stationary part the distance between the endof the stationary part and the corresponding end of the movable platewill be reduced, and a second die eomprisin a plunger adapted to projectinto said cavity and a stripper and pressure platen surrounding theplunger and adapted to engage the yielding or movable plate to force itlongitudinally.

The combination of a die bed, afemale die thereon having a fixed partand a movable plate, the movable plate having only a limited range ofmovement, springs for holding the movable plate in one extreme position,a plunger movable into and through said die, and a pressure platenmovable with the plunger for engaging any part of the article or blankto be shaped which pro ects beyond said movable plate and forcing thesame longitudinally with said movable plate, whereby part of the metalin the blank will be upset and forced into any depressions in the die,

In a machine for upsettinga blank having a tubular part provided with alarger diameter at its open end than at the r closed d and a flange onits open end, the combination of a stationary die for supporting; saidblank, said die comprising a ringshaped member at the end thereof forreceiving the end of the smaller portion of the tubular blank, the endof said ring abutting against the shoulder of the blank at the end ofsaid larger portion, a yieldingly mounted pl ate having a passagetherethrough fitting .1 all o the blank is being: upset.

rw u i 7 n a macnine ioi upsetting, olanh in; a tubular part provuiledwith a diameter at its open end than at the end, the combination of astationary die for supporting said blank, said die comprising aring-shaped member for receiving the end of the smaller portion of thetubular blank, the end of said ring abutting a ainst the shoulder of theblank at the end or said larger portion, a yieldingly mounted platehaving a passage fitting the ring-shaped member and the large tubularportion of the blank, means for pressing on said yielding pla e and atthe same time holding the edge of the blank and forcing itlongitudinally with the yielding plate to upset it against the end ofsaid ring-shaped member, and a plunger fitting the interior of the blankto prevent any flow of the metal inwardly while the large portion of theblank is being upset.

7. The combination of a die bed, a female die thereon having a fixedpart and a movable plate, the movable plate having only a limited rangeof movement, springs for holding the movable plate in one extremeposition, a plunger movable into and through said die, a pressure platemovable with the plunger for engaging any part of the article or blankto be shaped which proects beyond said movable plate and forcing thesame longitudinally with said movable plate, positive means for movingsaid pressure plate into position to hold the article and move it andthe movable plate, and yielding means for moving the plunger with thepressure plate.

8. The method of upsetting a tubular blank which consists in positivelyholding he interior of the blank at all points to prevent flow inwardly,also'holding its exterior at both ends thereof and positively grippingthe open edge, confining the portion of the blank beyond the point atwhich it is held on the GXQQllOI and then moving the open end ofsaidblanl; longitudinally to upset the metal and fill all interstices inthe holding; means.

In testimony whereof I have hereunto affixed my signature;

HJAlZll lillt G. CARLSON.

